BS-4752 - 1971; Specification for circuit-breakers of rated voltage up to and including 1000 volts a.c. and 1200 volts d.c.
BS-4752 - 1971; Specification for circuit-breakers of rated voltage up to and including 1000 volts a.c. and 1200 volts d.c.
- London BSI 1971
- 70p
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